20 August 2015: Today, Robert Plant, the lead singer of one of the most influential rock bands of the 20th century, turns 67. His former bandmate Jimmy Page might have dashed fans' hopes earlier this month by saying he "can't foresee" the band ever reforming, but that can't take away from all that they contributed to the music world.
Even if you're a huge Zeppelin fan, such is the length and breadth of their rollercoaster of a career, that there's probably plenty you never knew about them. Did you know, for example, that Keith Moon is responsible for their name? Or that Robert Plant wasn't first choice for lead singer?
Here are 12 brilliant, weird and fascinating facts about Led Zeppelin. Robert, you probably already knew all these, but we hope you have a great day.